Clon Arduino 2560, Orginal Arduino Mega 2560 ???

My programining run Orginal Arduino but Clon same programming don't run . Why ? Please help me.
Thank you.


Okey:( but I have to use. Orginals too expensive.

What did the supplier say about your faulty (not geniune) Arduino 2560 ?

Please provide a detailed explanation about what you mean by "same programming don't run".